In case you have not found it there is a search facility. Click on search on the purple bar and enter the terms of interest.
There have been a few posts looking at herceptin and aromatase inhibitors including arimidex. I am no expert so there is no point me trying to paraphrase them.
Here is one I found using the search facility to start you off
http://www.her2support.org/vbulletin...eptin+arimidex
RB